986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Infotainment System for Porsche Car [from CAD, prototyping to finish]

Nine8Six · 08-15-2017, 01:18 PM

Haha Kevin, yea not going to be an expansive unit at all. Aiming for less than 8,999 (EURO), fingers crossed bud lolll

Troy!!

Ran a few static thermal sims with the CPU max’ed up to its 5Watts, and getting less than dramatic results. This is with the wind, tornados and typhoons turned ON (i.e. Flow) among other sim elements e.g. environment convection and thermal couplings (aka ‘semi’-basic sim). To maintain/stabilize the air temp below 50dC across the unit (static) we need a minimum volume of 0.0016~0.0018m3/s (or 3.5~4CFM if you prefer). Considering a ‘pocket size’ performance computer, that’s not a lot! There, some advantages to designing overkill heatsinks lollll

I have yet to run the transient sims with the temp data I’ve acquired a few weeks ago but then… at that stage I am not worried anymore. Might play with this later on tough, curiosity win and I have the tools to do it so… why not.

Cooling Fan:

I am using the standard DC Fan #3010 bolt pattern therefore, and shall you need to service the unit in 2~3 years loll (i.e. replace the fan), you can get this same dc fan-size everywhere (radioshack/ebay/keywords: DC Fan 3010).

Interestingly enough, I’ve found this dc fan in the 4.x CFM rating in our 3010 bolt pattern, just what we need. However this little monster spins at 7000RPM. So very likely it will(should?!) be quite noisy :/ Dunno, never seen nor worked with a ‘Magnetic Levitation Fan’ (whatever that does). We’ll see, got two on order to test – I’ll Quick Update on the noise level of the Super DC Fan soon LOL (desperate stuff….)

^ 7k RPM... good god... if this thing pass the one month 24/7 ON test I plan on giving it on arrival, it should live forever imo lolll p/n: SUNON KDE0503PFV2-8.

^ Top view of the unit while the CPU is basically at its scorching HOT'est (5watts). A lot, if not all, gets dissipated to the AL heatsink. The central PCB area is warm, but not critical hot at all (30~35.ish dC).

^ Bottom view. That air really does work a lot of heat on its way to the fan. This is actually with a full 0.002 m3/s air flow (4.2CFM).

^ Cut in half, so you can see what's the deal inside of the unit.

^ Some random pic because, well, pink is nice on Pcar forums!

^ This. Custom made. For us. Undecided whether to use thermal tape or grease between the CPU/GPU and the heasink's pads (OCD? lollll)

08-15-2017, 01:18 PM	#157
Nine8Six Registered User Join Date: Sep 2013 Location: Montreal, QC. (currently expat to Shanghai) Posts: 3,249	Haha Kevin, yea not going to be an expansive unit at all. Aiming for less than 8,999 (EURO), fingers crossed bud lolll Troy!! Ran a few static thermal sims with the CPU max’ed up to its 5Watts, and getting less than dramatic results. This is with the wind, tornados and typhoons turned ON (i.e. Flow) among other sim elements e.g. environment convection and thermal couplings (aka ‘semi’-basic sim). To maintain/stabilize the air temp below 50dC across the unit (static) we need a minimum volume of 0.0016~0.0018m3/s (or 3.5~4CFM if you prefer). Considering a ‘pocket size’ performance computer, that’s not a lot! There, some advantages to designing overkill heatsinks lollll I have yet to run the transient sims with the temp data I’ve acquired a few weeks ago but then… at that stage I am not worried anymore. Might play with this later on tough, curiosity win and I have the tools to do it so… why not. Cooling Fan: I am using the standard DC Fan #3010 bolt pattern therefore, and shall you need to service the unit in 2~3 years loll (i.e. replace the fan), you can get this same dc fan-size everywhere (radioshack/ebay/keywords: DC Fan 3010). Interestingly enough, I’ve found this dc fan in the 4.x CFM rating in our 3010 bolt pattern, just what we need. However this little monster spins at 7000RPM. So very likely it will(should?!) be quite noisy :/ Dunno, never seen nor worked with a ‘Magnetic Levitation Fan’ (whatever that does). We’ll see, got two on order to test – I’ll Quick Update on the noise level of the Super DC Fan soon LOL (desperate stuff….) ^ 7k RPM... good god... if this thing pass the one month 24/7 ON test I plan on giving it on arrival, it should live forever imo lolll p/n: SUNON KDE0503PFV2-8. ^ Top view of the unit while the CPU is basically at its scorching HOT'est (5watts). A lot, if not all, gets dissipated to the AL heatsink. The central PCB area is warm, but not critical hot at all (30~35.ish dC). ^ Bottom view. That air really does work a lot of heat on its way to the fan. This is actually with a full 0.002 m3/s air flow (4.2CFM). ^ Cut in half, so you can see what's the deal inside of the unit. ^ Some random pic because, well, pink is nice on Pcar forums! ^ This. Custom made. For us. Undecided whether to use thermal tape or grease between the CPU/GPU and the heasink's pads (OCD? lollll) __________________ ______________________________ '97 Boxster base model 2.5L, Guards Red/Tan leather, with a new but old Alpine am/fm radio.